The story of the Illiad is this: Helen, the wife of King Menelaus of Sparta, was abducted by Paris, son of King Priam of Troy. Since Helen was the most beautiful woman in the world, the Trojans refused to give her up at the demand of King Menelaus. Menelaus and his brother Agamemnon accordingly founded a league of all the Greek kingdoms to besiege Troy and her allies, in an effort to bring Helen home. So the Greek warriors set out for Troy. They hauled their ships up on the beach to form their camp. The siege thus began and lasted ten years, with frequent and indecisive fighting on the plain between the camp and the walled city. The Greeks finally took the city, slew or captured its inhabitants, and returned home with Helen.
In the ninth year of the siege Agamemnon, the leader of the Greek host and Achilles, its best warrior had a quarrel. Achilles sulked in his tent and refused to fight for fourteen days.
During this time the Trojans attacked the Greek encampment. In the battle Hector, the champion of the Trojans, a brother of Paris, fought and killed Patroclus which forces Achilles back into battle to avenge his friend. He engages in single combat with Hector while the Trojans look on from the walls of the city and the Greeks from their side of the plain. Hector is slain and to complete his revenge Achilles drags the body of the dead warrior around the walls in the dust. Hector’s aged father Priam then comes humbly to Achilles to ransom the body of his son.
After the ten year siege of Troy by the Greeks, the city was taken by means of a trick. Pretending to abandon the war, the Greeks sailed away, leaving behind them a huge wooden horse which actually concealed within it a number of armed men. The Trojans, delighted with the wooden horse, brought it into the city and proceeded to celebrate their victory. During the night, the Greeks inside the horse came out and opened the gates to the other Greek army outside the city and proceeded to destroy and capture the city.
And this fulfills the final victory of the Greeks.